Include empty arrays and maps in the generated Config.md

It's not an ideal solution because there's no indication of what kind of objects
you can add to those maps or arrays, but at least they show up at all (with a
comment containing a link to more information), and that's already an
improvement.

pkg/jsonschema/generate_config_docs.go

@@ -205,16 +205,6 @@ func recurseOverSchema(rootSchema, schema *jsonschema.Schema, parent *Node) {
 	for pair := schema.Properties.Oldest(); pair != nil; pair = pair.Next() {
 		subSchema := getSubSchema(rootSchema, schema, pair.Key)
 
-		// Skip empty objects
-		if subSchema.Type == "object" && subSchema.Properties == nil {
-			continue
-		}
-
-		// Skip empty arrays
-		if isZeroValue(subSchema.Default) && subSchema.Type == "array" {
-			continue
-		}
-
 		node := Node{
 			Name:        pair.Key,
 			Description: subSchema.Description,
@@ -235,6 +225,10 @@ func getZeroValue(val any, t string) any {
 		return ""
 	case "boolean":
 		return false
+	case "object":
+		return map[string]any{}
+	case "array":
+		return []any{}
 	default:
 		return nil
 	}